Building block



E. PRESTON.

BUILDING BLOCK. APPLICATION FILED AUG.2. 1920.

Patented'May 30, 1922.

A TTOR NE Y i T 0 all whom t mrtg swiss ossia,

i EDWIN PRESTON, OF OAKLAND, CALIFORNIA.

BUILnrNG BLOCK. l

Lerares.

Application led. August 2, 1920. `Serial No. 400,581.

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Be it known t at I, EDWIN PRESTON, a citizen of the United States, and a resident of Oakland, county of Alameda` and State of California, have invented a new and useful Building Block, of which the following is a specication.

My invention relates to building blocks and particularly to the hollow type made of concrete or the like.

An object of the invention is to provide a building block which when disposed 1n a wall comprised of these blocks, will interlock and form a wind-break at each of its j unctures with the associated blocks, without the aid of a binding medium.

Another object of the invention is to provide a block which will permit of the blocks being interlocked in staggered relation.

lThe invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of my invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood that I do not limit myself to the showing made by the said drawings and description, as I may adopt variations of the preferred form within the scope of my invention as set forth in the claim.

Referring to said drawings:

Fig. 1 is perspective view of the block.

Fig. 2 is perspective view of the block viewing it from a different angle than that of Fig. l.

Fig. 3 is a vertical section of a number of the blocks set up.

The preferred embodiment of the block 2 of my invention is preferably in the form of a parallelepiped having its bases with unequal adjacent sides. The block as here shown is hollow and provided with a web 3 which extends from the middle of one side wall 4 of the block to the other side wall 5.

Means are provided for interlocking the abutting ends of adjoining blocks when the latter are assembled in a building wall. Formed on the outer side of the end wall 7 of the block is a vertical rib 8 which preferably extends from the top to the bottom thereof. The other end wall 9 of the block is formed with a groove 11 which is aligned with and of the same shape as the rib 8.

Vhen the blocks are properly assembled as shown in Figure 3 the rib of one block will fit into the groove of the adjoining block thereby not only interlocking the end walls but providing an effective wind-break at the opening therebetween. y

Means are also provided for effectively interlocking each block with the adjoining blocks above and below it. `Formed upon one of the bases or faces 12 and 13 of the block is -a substantially continuous shoulder 14 which extends along the inner edges of the face but is spaced from the outer edges thereof. Although the drawings show the shoulder as being on the top face 12 of the l block, it is to be understood that this is merely for the purpose of illustration, as it is obvious that the block may be arranged in the wall of the building either with the shouldered face above or below. The bottom face 13 of the block is formed at its inner edge with a depressed portion 15 which is aligned with and corresponds in shape to the shoulder 14. In order that the layers of blocks when assembled may lie in staggered relation, I omit the shoulders at the middle of the side walls to form recesses 17 and 1S so that the undeformed portion 19 of the bottom faces of adjoining end walls of the next layer of blocks may fit therein, thereby firmly locking the blocks together as well as in position. To augment the locking feature just referred to, the web 3 preferably extends to the bottom face so that when the blocks are assembled the lower end of the web will fit into the space between the shoulders of adjoining blocks of the layer above or below as the case may be. It will be noted that the top .21 of the web 3 is iiush with the face 12 or bottom of the recesses so that a large bearing is provided for supporting the bottom faces of the end walls of the blocks when the latter' are assembled.

I claim:

A hollow building block comprising end and side walls having top and bottom faces, a web parallel to and of the same thickness as said end walls arranged to connect said side walls together whereby a pair of tra-nsversely aligned openings are formed in said block, a substantially continuous shoulder formed `along each of the upper edges of said openings except the edge defined by said web, the terminating faces of said shoulders being parallel to and in the plane my hand at Oakland, California, this 19th of the adjacent face of said web, andl a egonday of July, 1920.r tinuous shoulder extending along t e oty tom edges of said block spaced from the n- ,EDWIN PRESTON' 5 nel' sides of said openings and having its In preseneeo-4 lower face flush with the bottom of said Web. L. L. M. SALSBURY,

In testimony whereof, I have hereunto set F. L. PRESTON. 

